Has anyone successfully flashed Coreboot on a Clevo laptop that originally shipped with proprietary firmware?

I’m looking to flashing Coreboot on Clevo laptops that did *not* come from the factory with open‑source firmware (e.g. not NovaCustom or System76). I’ve seen NovaCustom’s V54/V56 models and system76 with prebuilt Coreboot—those look very promising, but their price is a bit high. Meanwhile, there are other vendors offering generic Clevo models (appears using the same Clevo V540/V560 hardware).

What I’d like to know:

1. If I buy a generic Clevo V540/V560/X560/X580, can I realistically flash it with Coreboot?
2. It seems that Intel BootGuard may *prevent* Coreboot from running if it’s enabled on stock Clevo hardware.
3. I’ve come across reports that Clevo’s BootGuard private keys may have been *leaked*, and some forum posts suggest this might allow signing custom BIOS images to bypass BootGuard.
4. However, it’s not clear if anyone has actually succeeded in flashing Coreboot on a *stock* Clevo laptop.

My main questions are:

* Has anyone here successfully flashed Coreboot on a Clevo unit that shipped with proprietary firmware?
* If so, did you rely on leaked BootGuard keys (or some other method)?
* If not, is BootGuard still effectively blocking Coreboot on Clevo?
Any insights, success stories, or war stories would be hugely appreciated—thanks in advance!

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